diff options
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 162 |
1 files changed, 14 insertions, 148 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index e9eae57a2b50..210cf4874cb7 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -102,7 +102,7 @@ static int acpi_i2c_add_resource(struct acpi_resource *ares, void *data) struct acpi_resource_i2c_serialbus *sb; sb = &ares->data.i2c_serial_bus; - if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) { + if (!info->addr && sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) { info->addr = sb->slave_address; if (sb->access_mode == ACPI_I2C_10BIT_MODE) info->flags |= I2C_CLIENT_TEN; @@ -698,101 +698,6 @@ static void i2c_device_shutdown(struct device *dev) driver->shutdown(client); } -#ifdef CONFIG_PM_SLEEP -static int i2c_legacy_suspend(struct device *dev, pm_message_t mesg) -{ - struct i2c_client *client = i2c_verify_client(dev); - struct i2c_driver *driver; - - if (!client || !dev->driver) - return 0; - driver = to_i2c_driver(dev->driver); - if (!driver->suspend) - return 0; - return driver->suspend(client, mesg); -} - -static int i2c_legacy_resume(struct device *dev) -{ - struct i2c_client *client = i2c_verify_client(dev); - struct i2c_driver *driver; - - if (!client || !dev->driver) - return 0; - driver = to_i2c_driver(dev->driver); - if (!driver->resume) - return 0; - return driver->resume(client); -} - -static int i2c_device_pm_suspend(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_suspend(dev); - else - return i2c_legacy_suspend(dev, PMSG_SUSPEND); -} - -static int i2c_device_pm_resume(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_resume(dev); - else - return i2c_legacy_resume(dev); -} - -static int i2c_device_pm_freeze(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_freeze(dev); - else - return i2c_legacy_suspend(dev, PMSG_FREEZE); -} - -static int i2c_device_pm_thaw(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_thaw(dev); - else - return i2c_legacy_resume(dev); -} - -static int i2c_device_pm_poweroff(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_poweroff(dev); - else - return i2c_legacy_suspend(dev, PMSG_HIBERNATE); -} - -static int i2c_device_pm_restore(struct device *dev) -{ - const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - - if (pm) - return pm_generic_restore(dev); - else - return i2c_legacy_resume(dev); -} -#else /* !CONFIG_PM_SLEEP */ -#define i2c_device_pm_suspend NULL -#define i2c_device_pm_resume NULL -#define i2c_device_pm_freeze NULL -#define i2c_device_pm_thaw NULL -#define i2c_device_pm_poweroff NULL -#define i2c_device_pm_restore NULL -#endif /* !CONFIG_PM_SLEEP */ - static void i2c_client_dev_release(struct device *dev) { kfree(to_i2c_client(dev)); @@ -804,6 +709,7 @@ show_name(struct device *dev, struct device_attribute *attr, char *buf) return sprintf(buf, "%s\n", dev->type == &i2c_client_type ? to_i2c_client(dev)->name : to_i2c_adapter(dev)->name); } +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf) @@ -817,8 +723,6 @@ show_modalias(struct device *dev, struct device_attribute *attr, char *buf) return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name); } - -static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); static struct attribute *i2c_dev_attrs[] = { @@ -827,29 +731,7 @@ static struct attribute *i2c_dev_attrs[] = { &dev_attr_modalias.attr, NULL }; - -static struct attribute_group i2c_dev_attr_group = { - .attrs = i2c_dev_attrs, -}; - -static const struct attribute_group *i2c_dev_attr_groups[] = { - &i2c_dev_attr_group, - NULL -}; - -static const struct dev_pm_ops i2c_device_pm_ops = { - .suspend = i2c_device_pm_suspend, - .resume = i2c_device_pm_resume, - .freeze = i2c_device_pm_freeze, - .thaw = i2c_device_pm_thaw, - .poweroff = i2c_device_pm_poweroff, - .restore = i2c_device_pm_restore, - SET_RUNTIME_PM_OPS( - pm_generic_runtime_suspend, - pm_generic_runtime_resume, - NULL - ) -}; +ATTRIBUTE_GROUPS(i2c_dev); struct bus_type i2c_bus_type = { .name = "i2c", @@ -857,12 +739,11 @@ struct bus_type i2c_bus_type = { .probe = i2c_device_probe, .remove = i2c_device_remove, .shutdown = i2c_device_shutdown, - .pm = &i2c_device_pm_ops, }; EXPORT_SYMBOL_GPL(i2c_bus_type); static struct device_type i2c_client_type = { - .groups = i2c_dev_attr_groups, + .groups = i2c_dev_groups, .uevent = i2c_device_uevent, .release = i2c_client_dev_release, }; @@ -1261,6 +1142,7 @@ i2c_sysfs_new_device(struct device *dev, struct device_attribute *attr, return count; } +static DEVICE_ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device); /* * And of course let the users delete the devices they instantiated, if @@ -1315,8 +1197,6 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr, "delete_device"); return res; } - -static DEVICE_ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device); static DEVICE_ATTR_IGNORE_LOCKDEP(delete_device, S_IWUSR, NULL, i2c_sysfs_delete_device); @@ -1326,18 +1206,10 @@ static struct attribute *i2c_adapter_attrs[] = { &dev_attr_delete_device.attr, NULL }; - -static struct attribute_group i2c_adapter_attr_group = { - .attrs = i2c_adapter_attrs, -}; - -static const struct attribute_group *i2c_adapter_attr_groups[] = { - &i2c_adapter_attr_group, - NULL -}; +ATTRIBUTE_GROUPS(i2c_adapter); struct device_type i2c_adapter_type = { - .groups = i2c_adapter_attr_groups, + .groups = i2c_adapter_groups, .release = i2c_adapter_dev_release, }; EXPORT_SYMBOL_GPL(i2c_adapter_type); @@ -1419,8 +1291,6 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, if (of_get_property(node, "wakeup-source", NULL)) info.flags |= I2C_CLIENT_WAKE; - request_module("%s%s", I2C_MODULE_PREFIX, info.type); - result = i2c_new_device(adap, &info); if (result == NULL) { dev_err(&adap->dev, "of_i2c: Failure registering %s\n", @@ -1796,11 +1666,15 @@ void i2c_del_adapter(struct i2c_adapter *adap) /* device name is gone after device_unregister */ dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name); - /* clean up the sysfs representation */ + /* wait until all references to the device are gone + * + * FIXME: This is old code and should ideally be replaced by an + * alternative which results in decoupling the lifetime of the struct + * device from the i2c_adapter, like spi or netdev do. Any solution + * should be throughly tested with DEBUG_KOBJECT_RELEASE enabled! + */ init_completion(&adap->dev_released); device_unregister(&adap->dev); - - /* wait for sysfs to drop all references */ wait_for_completion(&adap->dev_released); /* free bus id */ @@ -1859,14 +1733,6 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) if (res) return res; - /* Drivers should switch to dev_pm_ops instead. */ - if (driver->suspend) - pr_warn("i2c-core: driver [%s] using legacy suspend method\n", - driver->driver.name); - if (driver->resume) - pr_warn("i2c-core: driver [%s] using legacy resume method\n", - driver->driver.name); - pr_debug("i2c-core: driver [%s] registered\n", driver->driver.name); INIT_LIST_HEAD(&driver->clients); |